This support plate is constructed out of wrinkle textured, white coated aluminum and features the "AXIS" logo debossed into the plate. It measures approximately 18 3/4" L x 6 1/2" H overall. Mounts with (4) 3/16" Dia., (2) 3/8" Dia., and (2) 3/16" Dia. x 5/16 - 18 threaded blind tap holes.